Outlet valve for flush tanks



1,450,133 T. J. CAHILL OUTLET VALVE FOR FLUSH TANKS Filed Nov. 22, 1920' 2 sheets-sheet i zs f S Wmmw IIVI/E/I/TOI? Mar. 27, 1923.

T. J. CAHILL OUTLET VALVE FOR FLUSH TANKS 2 sheets-sheet 2 Filed Nov. 22, 1920 I l/Vl/E/VTOI? 2720172615.], Qz/zi/ WITNESSES fi my ammzrs Fatented Mar. 27, 1923.

unirnn stares THOMAS J. CAHILL, OF CORPUS C ISTI, TEXAS, ASSIGNOR OF ONE-HALF TO ROBERT DRISCOLL, OF DRISCOLL, TEXAS.

OUTLET VALVE FOR FLUSH TANKS.

Application filed November 22, 1920. Serial No. 425,844.

To all whom may {'orme'rn:

Be it known that I. THOMAS J. Quinn,-

a citizenof the United States, and a resident of Corpus Christi, in the county of Neuces and State of Texas, have invented a new and Improved Outlet Valve for Flush Tanks, of which the following is a full,

clear, and exact description.

This invention relates generally to flush tanks for toilet bowls and. refers more particularly to an improvement in an outlet valve therefor.

The invention contemplates and seeks for its main object to provide an outlet valve which is constructed in such a manner as to trap a volume of air, whereby upon the initial lifting of the valve from the seat the volume of air trapped thereln will operate to buoy the valve in the water until the emptying of the tank is effected.

The invention further contemplates the provision of an outlet valve or flush tanks which functions to more effectively seal the outlet pipe when the valve is seated.

A further aim of the invention resides in the provision of a valve of this character, which is extremely simple in constructlon thereby rendering it less expensive of production and which functions in a highly efflcient and satisfactory manner.

Vith the above stated objects and others in View, some of which will appear more clearly hereafter, the invention consists in the novel construction, combination and arrangement of parts hereinafter described and claimed and clearly illustrated in the accompanying drawings, in which;

Figure 1 is a fragmentary sectional view through a flush tank equipped with an outlet valve constructed in accordance with the invention and illustrating the valve seated.

Figure 2 is a similar view illustrating the valve unseated.

Figure 3 is a horizontal sectional view taken approximately on the line 33 of Figure 1.

Figure 4 is a vertical sectional view through a modified form of valve.

Figure 5 is a horizontal sectional view therethrough taken approximately on the line 55 of Figure 4.

Referring to the drawings by characters of reference, 10 designates a flush tank and 11 the outlet or flush pipe which is extended through the bottom wall thereof and suitsnugly fit the extension 23.

ably sealed against leakage. The pipe 11 is provided with the usual interiorly arranged flange 12 upon which the outlet valve seat 13 is clamped by an annular nut 14. As illustrated the valve seat 13 is pref erably constructed of hard rubber and is provided with an inner conical seating surface 15. The annular nut 14 is connected by the spider arms 16 to a smaller ring nut 17 into which is threaded the vertical tubular overflow pipe 18 which constitutes a guide for the valve 19. As illustrated in the preferred embodiment of the invention the valve 19 is preferably constructed of hard rubber and consists of three parts, namely an upper tubular section 20 having an enlarged interiorly threaded bore 21 at its lower end. A lower tubular section 22 having a reduced exteriorly threaded extension 23 at its upper end, an outwardly flared conical mouth 24 at its lower end, and a bell-shaped dome section 24 having an opening 25 at its upper end, the diameter of which is appropriate to receive and To assemble the valve the extension 23 of the lower tubular section is inserted through the opening 25 in the dome and the enlarged interiorly threaded recess 21 of the upper tubular section 20 is threadedly engaged thereover and to clamp the edges of the dome defining the opening 25 therebetween. The lower end of the dome section 24 is provided with an enlarged annular boss 26 having a conical seating surface 27 which is designed to engage and co-act with the inner conical seating surface 15 when the valve is in seated position. The peripheral edge of the outwardly flared conical mouth 24 is spaced slightly from the inner wall of the dome to provide a circular air inlet 28 to the air space or chamber 29. Any suitable valve lifting means 30 may be employed for lifting the valve from its seat.

In operation, when the conical surfaces 27 and 15 are engaged and the valve is closed, the air will enter the air space 29 in the dome 24 through the circular air inlet opening 28 through the pipe 11 to create a closer contact and more effective seal of the valve with its seat. When the valve lifting means 30 is actuated to lift the valve from its seat the volume of air in the air space 29 will be trapped hy the water as in the case of the usual diving bell and will operate to buoy the valve 19 and retain the same against closure until the tank has been emptied.

In the modified form illustrated in Figures 4 and 5 of the drawings, the valve 19 is constructed with the upper and lower tubular sections 20 and 22 and the dome 24: as integral, the peripheral edge of the flared mouth 24* having connecting webs 25 between the inner wall of the dome providing a plurality of air inlet spaces 26. The function and operation of the modified form is identical with that of the preferred embodiment and therefore a description of the same is omitted.

It is to be understood that the right is reserved to embodiments other than those actually illustrated herein, to the full extent indicated by the general meaning of the terms in which the claims are expressed and by variations in the phraseology of the same.

I claim:

1. An outlet for flush tanks comprising an outlet pipe having a valve seat, an overflow pipe supported therefrom in superposed relation and an outlet valve comprising a sleeve telescopically movable over the overflow pipe, said. sleeve having a flared mouth at its lower end, a bell shaped dome connected at its upper end above said flared mouth with the lower end extending below the lower'end of said mouth, and a valved surface on the lower end of said dome adapted to coact with the seat for closing the outlet.

2. The combination with a flush tank having an outlet pipe provided with a valve seat at its upper end and a superposed upstanding overflow pipe connected thereto and disposed in vertical alignment therewith, of an outlet valve comprising a sleeve mentary valve surface on the lower end of said dome adapted to coact with the seat when lowered thereagainst for closing the flush tank outlet.

3. In an outlet for flush tanks, the combination with an outlet pipe, a superposed overflow pipe disposed in vertical alignment therewith, a spider connection therebetween, and a valve seat on the upper end of said outlet pipe, of an outlet valve comprising sleeve adapted to slide on the overflow pipe and having a flared mouth at its lower end, a bell-shaped dome connected at its upper end above said mouth with the lower end thereof extending below said outlet mouth, and a valved surface on the lower end of said dome adapted to co-act with the seat, the space confined by the dome and said outlet mouth constituting an air chamber adapted to communicate with the atmosphere when the valve seated and adapted to be sealed by the water in the tank when the valve is unseated, as and for the purpose specified.

THOMAS J. CAHILL, 

